Buffing-machine.



No. 718,154. PATENTBD JAN. 13, 1903.

J. A.-PINE. BUF-FING' MACHINE.

APPLICATION FILED OCT. 2, 1902.

N0 MODEL.

llNrTEn STATES PATENT OFFICE.

JOSEPH A. PINE, OF MARLBORO, MASSACHUSETTS.

BUFFING-MACHIN E.

SPECIFICATION forming part of Letters Patent No. 718,154, dated January 13, 1903.

Application filed October 2, 1902. Serial No. 12 5,628. (No model.)

Massachusetts,have invented certain new and useful Improvements in Buffing-Machines, of

which the following is a specification.

This invention relates to buffing-machines of the general type illustrated in Patent No. 490,419, dated January 24, 1893, in which a buffing-pad is employed, mounted to rotate on an axis substantially at a right angle to the plane of the work to be abraded or buffed.

The object of the present invention is to provide an improved pad-holder which will enable the pad itself to be readily applied to or detached therefrom; and a further object of the present invention is to provide improved means for connecting the pad-holder with the driving-shaft.

To these ends the invention consists in the construction and arrange ment:of parts substantially as hereinafter described and claimed.

Of the accompanying drawings, Figure 1 represents a vertical section of a portion of a buffing-machine, said figure showing suffi' cient parts of such machine to illustrate the features of the present invention. Fig. 2 represents a detail section similar to a portion of Fig. 1, but showing a portion of the shank of the pad-holder in side elevation. Fig.3 represents a perspective view of the padcover.

The same reference characters indicate the same parts in all the figures.

A portion of the frame of the machine is represented at a, said frame having a split socket to receive the spindle b of the yoke b, a suitable bolt being indicated at a for clamping the spindle b in its socket. The arms of the yoke b are provided with bearings c for the shaft d, the latter having a pulley d secured thereto between the bearings. It is to be understood that a suitable driving-belt passes around the pulley d. The shaft or spindle dis formed with a screw-threaded portion 01 below the lower bearing a, and below the threaded portion d said shaft is provided with a pin or pins (1 projecting laterally therefrom. A nut 01 is fitted to the threaded portion d of the shaft or spindle.

an annular flange f, adapted to enter the annular recess e. A nut g is fitted to the threaded portion e of the shank of the padholder and is adapted to bear upon the washer f, so as to press the flange thereof into the annular recess 6.

Suitably secured to the under side and around the periphery of'the disk e, as by glue or otherwise, is an elastic pad-filling h, of felt or other suitable material. The pad-cover comprises a disk-shaped piece 2', of abrasive material, having tongues i',which extend over the filling h and into and across the recess 6 and are held therein by the flange f of the washer f. The elastic filling'around the periphery of the disk e and confined between it and the edge and tongues of the cover permits the. latter to yield somewhat under lateral strains and reduces liability of the cover being broken or torn. The pad-cover may be composed of emery-cloth or sandpaper or of other suitable abrasive or buffing material.

\Vhen it is desired to remove the pad-cover,

asimple rotation of the nut g will enable the Washer f to-be lift ed, so that the pad-cover can be removed, after which a new one may be applied by folding the tongues '11 over the margin of the disk e outside of the annular groove and then dropping the washerf and turning the nut g to cause the flangef of the washer to bind the "tongues i in the annular recess e. it

'The threaded shank e is formed with a socket to receive the lower end of the shaft 0 cl, and the upper end of said threaded shank is formed withslots e terminating in lateral enlargements a. When the pad-holder as a whole is to be attached to the shaft d, it is slipped up over the lower end thereof, so that 5 the slots 6 will pass the pins d and then a slight lateral turn is given to the shank e so that the pins d will pass into the lateral enlargements (2 After this operation the nut d is turned down to bear upon the upper end of the shank e so as to bind the pins d in the lateral enlargements e of the slots 6 A Loosely fitted on the shank, at 55 the lower end thereof, is a washer f, having reversal of this operation enables the padholder to be quickly removed from the shaft (1.

I claim- 1. In a machine of the character specified, a driving-shaft having a pin projecting from its side and formed with a threaded portion, a nut on said threaded portion, and a padholder having a socket to receive the end of the shaft and havinga slot formed with a lateral enlargement adapted to receive the pin of the shaft, whereby said nut may be turned against the end of the shank of the padholder to bind the pin in said slot.

2. The combination With the disk 6 having a threaded shank e and formed with an an- 

